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This example shows information about the dispensing and returning of the study product. In this study, moist tobacco product was dispensed in containers. The number of containers dispensed depended upon the duration between visits, and the amount of smokelsss tobacco used by the subject.  Each container was assigned a identification number. Each container was weighted when dispensed, and upon return. DASPID was used to represent the identification number assigned to each container. For this subject, study product was dispensed at Visit 1, it was returned at Visit 2, where another container was dispensed. This container was returned at Visit 3. No other containers were dispensed to the subject.